Here, we present results of a 1-month field measurement campaign carried out at the Hohenpeissenberg Observatory of the German Meteorological Agency (DWD). The used instruments comprise the novel GRIMM PSMPS nano mobility particle size spectrometer and a TROPOS type SMPS. The aim of this study is to gather data for an instrument intercomparison and an analysis of the overlapping region of the MPSS system since it is of special interest how well the recorded size spectra of the individual setups match in their overlapping size region of 10-55nm.

Characterization and continuous monitoring of ambient ultrafine particles (UFP) has been a topic in aerosol research for the last three decades. With much experience gained during this time, the next important step is harmonizing these measurements on the European level. This study will introduce a newly developed wide-range Scanning Mobility Particle Sizer (model 3938W50, TSI Inc., USA). We will present first results from calibration measurements and an instrument comparison with atmospheric aerosol following the recommendations given in the CEN technical specifications, documenting full conformity with CEN/TS 17434.

The polarized light scattering phase function of an aerosol, i.e. the angular, spectral and polarization dependence of scattered light for given incident radiation, is of central importance. For example, aerosol remote sensing methods often rely on polarimetry, as aerosol physical and optical material properties can be retrieved from such data by solving the inverse problem. Here we present a new in-situ instrument based on the imaging polar nephelometry approach, which makes measurements of the polarized light scattering phase function with high angular resolution possible.

We will introduce a novel instrument for measuring total concentration of highly oxygenated organic molecules. Some technical details are mentioned within the abstract and a lab experimental results are shown.